Ubisoft announces Anno 2070 Deep Ocean, an add-on for Anno 2070, the real-time strategy sequel expected this autumn. As the name implies, this takes the game under the water, and we have a pair of screenshots showing what this will look like. Here's a feature list:

New Civilization Level
For the first time in the history of the Anno series, an add-on brings a new civilization level: the Tech faction is expanded by the Genius population class.

A Deeper Game Experience
The new population class grants access to the new Tech Monument, new corresponding production chains and consumption goods. Furthermore, this new class features all-new vehicles and new items allowing players to develop industries, strengthen economies and exploit new resources.

Additional Content and Challenges
Players will also be able to:

Acquire enemy territories without military force using the Hostile Takeover feature.

Resolve energy problems by building the new underwater geothermal power plant.